Smith Fittings is a reputable manufacturer and supplier located in Canberra, Australia, specializing in top-notch **Duplex Steel S31803 Pipe Fittings**. These fittings are crafted to provide exceptional strength, corrosion resistance, and durability, making them perfect for tough industrial settings. Smith Fittings offers a diverse selection of S31803 pipe fittings, including elbows, tees, reducers, and caps, all produced to meet international quality standards. You’ll find Duplex Steel S31803 Pipe Fittings commonly used in the chemical processing, petrochemical, oil and gas, and marine sectors, where resistance to pitting, stress corrosion, and chloride attack is essential.
Specifications ASTM A815 / ASME SA815
Dimensions ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Size 1/2″ NB to 24″NB in
Type Seamless / Welded / Fabricated
Bending Radius R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Thickness Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS
These fittings are made up of about 22% chromium, 5–6% nickel, 3% molybdenum, and 0.14–0.20% nitrogen, resulting in a well-balanced duplex microstructure of austenite and ferrite. This unique composition offers outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, all while maintaining impressive mechanical strength. The alloy boasts a tensile strength ranging from 620 to 850 MPa and a yield strength of 450 MPa. Its blend of toughness, fatigue resistance, and dimensional stability makes it an excellent choice for high-pressure and corrosive environments.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| S31803 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
Smith Fittings is a leading supplier of Duplex Steel S31803 Pipe Fittings in Canberra, Australia. We offer an extensive range of Monel K500 fittings, renowned for their excellent corrosion resistance and high strength, which makes them perfect for demanding industrial applications like chemical processing, marine environments, and high-temperature systems. With a commitment to quality and reliable delivery, we ensure our clients receive top-tier products tailored to meet the specific needs of various industries.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| STANDARD | UNS | WERKSTOFF NR. |
| Duplex 2205 | S31803 | 1.4462 |
Duplex Steel S31803 Pipe Fittings from Smith Fittings offer exceptional corrosion resistance, especially in seawater and harsh environments. They are known for their high strength, durability, and resistance to pitting and crevice corrosion, ensuring long-lasting performance. We provide precise manufacturing, quality control, and reliable service for diverse industrial applications.
Duplex Steel S31803 pipe fittings offer exceptional corrosion resistance, particularly against pitting, crevice corrosion, and stress corrosion cracking, making them ideal for harsh environments. They provide high strength and excellent resistance to fatigue, making them durable under pressure. The alloy’s good weldability and formability enhance the ease of fabrication. Duplex Steel S31803 pipe fittings also offer superior toughness and stress resistance, ensuring reliability in demanding applications such as chemical processing, marine, and oil & gas industries. Their cost-effectiveness and long-lasting performance make them a preferred choice for critical piping systems.
| Outer Diameter And Inside Diameter | Equivalent | Diameter Of Pipe Nominal | Typical Threads In Inches |
| 5/16 | 0.313 | 1/16 | 27 |
| 13/32 | 0.405 | 1/8 | 27 |
| 35/64 | 0.540 | 1/4 | 18 |
| 43/64 | 0.675 | 3/8 | 18 |
| 27/32 | 0.840 | 1/2 | 14 |
| 1-3/64 | 1.050 | 3/4 | 14 |
| 1-5/16 | 1.315 | 1 | 11-1/2 |
| 1-21/32 | 1.660 | 1-1/4 | 11-1/2 |
| 1-29/32 | 1.900 | 1-1/2 | 11-1/2 |
| 2-3/8 | 2.375 | 2 | 11-1/2 |
| 2-7/8 | 2.875 | 2-1/2 | 8 |
| 3-1/2 | 3.500 | 3 | 8 |
| 4 | 4.000 | 3-1/2 | 8 |
Yes, custom sizes for Duplex Steel S31803 Pipe Fittings are available at Smith Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@smithfittings.com.
Duplex Steel S31803 Pipe Fittings are extensively utilized in pipelines, heat exchangers, pressure vessels, and process equipment across the chemical, petrochemical, and offshore industries. They are particularly well-suited for seawater handling, desalination plants, and oil and gas production systems, where exposure to chlorides and harsh chemicals is a regular occurrence. These fittings guarantee long-lasting, leak-proof connections and dependable performance under high-pressure, high-stress, and corrosive conditions, making them a go-to option for critical industrial applications.
Get in touch with one of our Technical Sales Representatives to request a quote or get answers to any questions you may have.
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